:root{font-family:Inter,Segoe UI,sans-serif;color:#0f172a;background:#f8fafc}*{box-sizing:border-box}body{margin:0}.app{max-width:900px;margin:0 auto;padding:16px}.card{background:#fff;border:1px solid #e2e8f0;border-radius:10px;padding:12px;margin-bottom:12px}.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}input,textarea,button,select{padding:8px;border-radius:8px;border:1px solid #cbd5e1;font:inherit}button{cursor:pointer;background:#0ea5e9;color:#fff;border:none}button.secondary{background:#475569}.list{display:grid;gap:8px}.item{border:1px solid #e2e8f0;border-radius:8px;padding:10px}.small{color:#475569;font-size:12px}.error{color:#b91c1c;font-size:13px}